Misty May-Treanor, diving for a ball (above), won their third gold medal in their last Olympics.AP

ENGLEWOOD, Colo. — How hard are the Broncos pinching themselves these days at the sight of No. 18 in blue and orange?

Von Miller won’t even call Peyton Manning by his first name.

In fact, Denver’s second-year Pro Bowl linebacker is so in awe of playing on the same team as the four-time NFL MVP that Miller still can barely look Manning in the eyes four months after the future first-ballot Hall of Famer unexpectedly signed with the Broncos.

“I don’t call him anything but Mr. Manning because I have so much respect for him,” Miller told The Post recently. “I get kind of nervous being around him, a guy with that much prestige.”

Miller isn’t the only one here who feels that way, which explains why one of the more magical, midseason turnarounds in recent league history — two words: Tim Tebow — feels more like a dusty, distant memory than something that happened just last season.

Though Manning recently turned 36, hasn’t played since the Colts’ home playoff loss to the Jets in January 2011 and is coming off four neck surgeries in just two years, Miller’s teammates sound a lot like Miller — blissful just to be in Peyton’s presence.

The same goes for the Broncos’ famously obsessed fanbase, which doesn’t seem to miss Tebow at all judging from the overflow crowds of that are packing the team’s training facility for every camp practice and practically cheering Manning’s every step.

They all get their first look of Manning under center in live action when the Broncos take on the Bears tonight in their preseason opener in Chicago.

Even a fellow future Hall of Famer, all-everything cornerback Champ Bailey, comes off like a schoolgirl instead of a 14th-year veteran when the subject is Manning.

“It’s definitely been a gift to play with him, even though we haven’t been in any games yet,” Bailey said after a steamy practice at the Broncos’ facility recently. “I always admired Peyton from afar. When I played against him, I hated him. But I’m glad he’s on my side now.”

Yet no one, not even Manning himself, can say for certain that he can be anywhere near the passer who torched opposing defenses to the eye-popping tune of nearly 55,000 yards and 399 TDs in 13 seasons before disk woes in his neck forced him to sit out last season and caused the Colts to release him in March.

Manning, who speaks to the media just once a week during training camp, admits physically he doesn’t feel back to the form yet that allowed him to throw for more than 4,000 yards each of the previous five seasons before his condition became unworkable.

“I still have rehab to do, which I will continue to do throughout training camp and through the season,” Manning said this week. “[I’m] getting more comfortable, but we still have work to do.”

Coach John Fox insists his staff doesn’t have Manning on any sort of “pitch count” in camp and that the legendary passer will play the same amount of preseason game snaps as any other NFL starting quarterback, but it does appear Denver is treading gingerly.

Manning was ridiculously sharp with his short throws and red-zone passes in back-to-back workouts earlier this week, and he appeared to be settling into quite a groove with wideout Eric Decker and tight ends Joel Dreessen and Jacob Tamme. But Manning also threw no more than a handful — one handful, to be specific — of passes longer than 20 yards in either practice.

And, of course, Manning and his surgically repaired neck have yet to endure their first actual hit since that playoff loss to the Jets 18 months ago.

Fox might be whistling past the graveyard when he says it, but the former Giants defensive coordinator insists he isn’t worried at all about how Manning’s health will hold up over a 16-game grind.

“The type of injury he had doesn’t make him fragile by any stretch,” Fox told The Post. “I definitely think he’s got a lot of football left. He had a setback [with the four surgeries], but so have a lot of great players.”

Proof will come starting Sept. 9 at home against the Steelers. Until then, the Broncos appeared determined to savor the greatness in their midst and talk about Manning as if it were 2006.

“It doesn’t look like he’s lost anything,” Bailey said. “But when he takes a lick, then we’ll all know.”